Radeon RX 580 vs Radeon RX 6800

Intro

Compare that to the Radeon RX 6800, which features clock speeds of 1700 MHz on the GPU, and 2000 MHz on the 16384 MB of GDDR6 RAM. It features 3840 SPUs along with 240 TAUs and 96 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 580		185 Watts
Radeon RX 6800		250 Watts
	Difference: 65 Watts (35%)

Memory Bandwidth

Theoretically, the Radeon RX 6800 should perform much faster than the Radeon RX 580 in general. (explain)

Radeon RX 6800		524288 MB/sec
Radeon RX 580		262144 MB/sec
	Difference: 262144 (100%)

Texel Rate

The Radeon RX 6800 should be a lot (approximately 125%) more effective at texture filtering than the Radeon RX 580. (explain)

Radeon RX 6800		408000 Mtexels/sec
Radeon RX 580		181008 Mtexels/sec
	Difference: 226992 (125%)

Pixel Rate

The Radeon RX 6800 should be much (about 306%) better at FSAA than the Radeon RX 580, and able to handle higher resolutions without slowing down too much. (explain)

Radeon RX 6800		163200 Mpixels/sec
Radeon RX 580		40224 Mpixels/sec
	Difference: 122976 (306%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of MB per second) that can be moved past the external memory interface within a second. The number is calculated by multiplying the bus width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.